Devices that Reduce Propeller Strikes

The devices fall into the following categories:

Guards:Devices that provide some type of physical barrier around the propeller. These include deflection devices, full cages, ring guards, ringed props, and "Kort Nozzles."

Propulsion: Devices other than a propeller such as jet drives and pump jets.

Interlocks: Devices that automatically turn off the engine or sound an alarm. For example, a ladder interlock stops the engine or triggers an alarm when passengers use the ladder to enter or leave the water.

Sensors: Wireless sensors or other devices worn by boaters that shut off the boat's engine or trigger an alarm if the wearer falls overboard.